Comparison of continuous-bed-motion and step-and-shoot acquisition modes on 18F-FDG PET/CT imaging

doi:10.3969/j.issn.1006-7795.2022.06.006

Abstract

Abstract: Objective To investigate the effects of continuous-bed-motion (CBM) and step-and-shoot (SS) acquisition modes on image quality and quantitative analysis in ¹⁸F-FDG(fluorodeoxyglucose) PET/CT (positron emission tomography/computed tomography) . Methods A total of 50 patients were prospectively selected and undertake PET image acquisition in Siemens Biograph Vision 600 PET/CT equipment with CBM and SS modes. Mean standardized uptake value (SUV_mean) and standard deviation (SD) of mediastinal blood pool, lung, liver, muscle, and bone were measured, and evaluate image noise with SD. Paired t test, Paired rank sum testPearson correlation analysis and Bland-Altman Figure were used to evaluate the difference and relationship between the data of two groups. Results In different acquisition sequences, the SUV_mean of mediastinal bloodPool and liver were decreased significantly (t= 5.630 and 4.993, all P<0.05), the SUV_mean of lumbar vertebra was increased significantly (t=-3.320, P<0.05), while the SUV_mean of lung and muscle was not significantly different (all P>0.05). In different acquisition modes, there were no significant difference in SUV_mean of all tissues (t values:from-1.626 to-0.311, P>0.05), and there were high correlation with them (r values: from 0.903 to 0.985),the Bland-Altman Figure shows that the mean difference of each tissues are-0.02(95%CI:-0.27 to 0.24), -0.01(95%CI:-0.05 to 0.03), 0.00(95%CI:-0.19 to 0.18), -0.01(95%CI:-0.08 to 0.06), -0.03(95%CI:-0.28 to 0.22),and 0.00(95%CI:-0.07 to 0.08). Except for the SD of thigh muscle (Z= -1.163, P>0.05), the SS_SD of other tissues was lower than that of CBM_SD (Z=-4.406, -2.856, -5.556, -2.954 and -3.104, all P<0.05). Conclusion CBM is a flexible acquisition method, which can provide the same quantitative information as SS. It is an effective supplement to PET/CT image acquisition method.

Key words: positron emission tomography, step-and-shoot mode, continuous-bed-motion mode, mean standardized uptake value

CLC Number:

R331

Yang Sen, Wang Ling, Liu Peng, Jin Chaoling, Li Honglei, Fu Liping. Comparison of continuous-bed-motion and step-and-shoot acquisition modes on ¹⁸F-FDG PET/CT imaging[J]. Journal of Capital Medical University, 2022, 43(6): 854-860.

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URL: https://journal03.magtech.org.cn/Jweb_sdykdxxb/EN/10.3969/j.issn.1006-7795.2022.06.006

https://journal03.magtech.org.cn/Jweb_sdykdxxb/EN/Y2022/V43/I6/854

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Comparison of continuous-bed-motion and step-and-shoot acquisition modes on ¹⁸F-FDG PET/CT imaging

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